A method of cable jacket dumbbell sampling

Abstract

The present application relates to a kind of cable outer sheath dumbbell sample preparation method, first, the cable outer sheath of stripping is unfolded;Second step, the cable outer sheath in unfolded state is made to pass through cutter and cut off one side surface layer;Third step, the surface layer of the cable outer sheath in unfolded state in which one side surface layer is cut off is shaped on the side of surface layer cut-off, and the dumbbell-shaped cutout matching the dumbbell shape of cable outer sheath is formed, the depth of dumbbell-shaped cutout is above the thickness of cable outer sheath dumbbell;Fourth step, the cable outer sheath in unfolded state with dumbbell-shaped cutout is made to pass through cutter here and cut off sheath middle layer, the part of sheath middle layer located in the surrounding of dumbbell-shaped cutout is taken down, and the taken-down part is cable outer sheath dumbbell.The present application provides a kind of cable outer sheath dumbbell sample preparation machine which can be made into cable outer sheath dumbbell after forming cable outer sheath dumbbell, and provides a kind of new manufacturing method of cable outer sheath dumbbell.

Description

Technical Field

[0001] This invention relates to the field of power engineering material testing technology, and in particular to a method for preparing dumbbell-shaped samples of cable outer sheaths. Background Technology

[0002] With urban development and power grid upgrades, more and more overhead power lines are being replaced by power cables, resulting in a significant increase in cable laying, construction, and emergency repairs. The stable operation of cables is closely related to their quality. To ensure the quality of laid cables, they must pass inspection by a testing center before laying can begin. Cable testing requires the creation of... Figure 2 The dumbbell-shaped test sample shown (hereinafter referred to as cable outer sheath dumbbell sample 60) is manufactured as follows: a section of the cable outer sheath is peeled off from the cable, then the inner and outer surfaces of the cable outer sheath are removed, leaving an outer sheath middle layer of about 2 mm thick. The dumbbell sample is then die-cut using a dumbbell-shaped mold. The existing method of removing the inner and outer surfaces of the cable outer sheath to form the outer sheath middle layer involves multiple manual cuts, which is inefficient, labor-intensive, inaccurate, and results in poor surface smoothness. With urban construction and power grid upgrades, more and more overhead lines are being replaced by power cables, leading to a large amount of cable laying, construction, and fault repair. The stable operation of the cable sheath is closely related to the quality of the cable itself. To ensure the quality of the laid cables, they must pass inspection by a testing center before laying. Cable testing requires the creation of... Figure 2 The dumbbell-shaped test sample shown (hereinafter referred to as cable outer sheath dumbbell sample 60) is manufactured as follows: a section of the cable outer sheath is peeled off from the cable, then the inner and outer surfaces of the cable outer sheath are removed, leaving an outer sheath intermediate layer of about 2 mm thick. The cable outer sheath dumbbell sample is then die-cut using a dumbbell sample forming mold. Existing methods for removing the inner and outer surfaces of the cable outer sheath to form the outer sheath intermediate layer involve multiple manual cuts, which are inefficient, labor-intensive, inaccurate, and result in poor surface smoothness. Current methods for forming cable outer sheath dumbbell samples involve first forming the sheath intermediate layer and then cutting out the cable outer sheath dumbbell sample. Summary of the Invention

[0003] This invention provides a cable outer sheath dumbbell pattern making machine that first forms a dumbbell pattern of the cable outer sheath and then forms a dumbbell pattern of the cable outer sheath, and provides a new method for making cable outer sheath dumbbell patterns.

[0004] The above technical problems are solved by the following technical solution: a method for preparing a dumbbell-shaped cable outer sheath, characterized in that: first, the stripped cable outer sheath is unfolded; second, the unfolded cable outer sheath is shaved off one side of its surface layer by a cutting tool; third, a dumbbell-shaped cut matching the dumbbell shape of the cable outer sheath is formed on the side of the unfolded cable outer sheath where the surface layer has been shaved off, the depth of the dumbbell-shaped cut being greater than or equal to the thickness of the dumbbell-shaped cable outer sheath; fourth, the unfolded cable outer sheath with the dumbbell-shaped cut is shaved off the middle layer of the sheath by a cutting tool, and the portion of the middle layer of the sheath located within the dumbbell-shaped cut is removed, the removed portion being the dumbbell-shaped cable outer sheath.

[0005] Preferably, this is achieved using a dumbbell-shaped sample making machine for cable outer sheaths. The machine includes a frame with a loading position, a cutting blade mounting position, and a die-cutting position arranged horizontally on the frame. A cutting blade is mounted on the cutting blade mounting position, and a dumbbell-shaped forming mold is mounted on the die-cutting position. The frame also includes a cable outer sheath fixing mechanism, a horizontal moving mechanism, and a vertical moving mechanism. The specific process for making the dumbbell-shaped sample is as follows: the stripped cable outer sheath is spread out and fixed on the cable outer sheath fixing mechanism. The length of the cable outer sheath extends horizontally. The vertical moving mechanism drives the cutting blade to descend to the required height, and the horizontal moving mechanism drives the cable outer sheath fixing mechanism to move towards the die-cutting position. During the movement, the cable outer sheath passes the cutting blade, and one side of the surface layer is removed. After the fixing mechanism reaches the die-cutting position, the vertical moving mechanism drives the dumbbell-shaped forming mold to descend and cut a dumbbell-shaped slit in the cable outer sheath. The depth of the dumbbell-shaped slit is above the thickness of the middle layer of the outer sheath. The vertical mechanism drives the dumbbell-shaped forming mold and the cutting blade to rise to avoid the cutting blade. The horizontal moving mechanism drives the cable outer sheath fixing mechanism to the conductive feeding position. The vertical moving mechanism drives the cutting blade to descend so that the distance between the cutting blade edge and the upper surface of the cable outer sheath fixed on the cable outer sheath fixing mechanism is equal to the thickness of the middle layer of the outer sheath. The horizontal moving mechanism drives the cable outer sheath fixing mechanism to move toward the die-cutting position again. During the movement, the cable outer sheath passes through the cutting blade and the middle layer of the outer sheath is removed by the cutting blade. The part of the middle layer of the sheath located in the dumbbell-shaped slit is removed. This removed part is the dumbbell-shaped outer sheath of the cable.

[0006] Preferably, the cutting tool includes a cutting tool holder and a cutting blade detachably connected to the cutting tool holder. The cutting tool holder is connected to a vertical moving mechanism. The direction lines of each part of the cutting edge of the cutting blade are located on a horizontal plane. A reversing guide slope is provided between the upper end of the cutting tool holder and the cutting blade. The reversing guide slope is used to guide the cut-off layer from the cable outer sheath to move in the direction of the cutting tool cutting the cable outer sheath. This avoids the cut-off part of the cable outer sheath from interfering with the dumbbell-shaped forming mold forming dumbbell-shaped notches on the cable outer sheath by reaching the die-cutting position, thereby avoiding affecting the accuracy of the dumbbell-shaped cable outer sheath produced.

[0007] Preferably, the cutter holder has a blade mounting groove, with one end of the groove facing the cutting edge of the cutting blade being lower and the other end higher. The width of the groove is equal at all points. The cutting blade passes through the groove, and the surfaces at both ends of the cutting blade in the thickness direction are flat. A beveled cutting edge is formed on the side of the cutting blade extending beyond the groove, away from the reversing guide slope. The beveled cutting edge is formed between the beveled cutting edge and the surface of the cutting blade facing the reversing guide slope. This design facilitates convenient and reliable installation and ensures that the portion cut from the cable sheath is more reliably separated from the cable sheath and reaches the reversing guide slope, thus improving the reliability of the reversal of the portion cut from the cable sheath.

[0008] Preferably, the cutter holder is detachably connected to a cutter fixing block whose upper surface, in the same direction as the thickness of the cutter blade, contacts and presses against the cutter blade.

[0009] Preferably, the cutter holder has a cutter bolt through hole extending along the cutting direction of the cutter, and the cutter fixing block has a cutter threaded hole. The cutter bolt passes through the cutter bolt through hole and is threaded into the cutter threaded hole, driving the cutter fixing block to move away from the cutting edge of the cutter, thus pressing the cutter fixing block against the cutter. This provides convenient and reliable cutting of the cutter. Lateral movement of the bolt generates a vertical pressing force.

[0010] Preferably, the guide slope for changing direction is provided with a cutting tool recess, and the cutting tool fixing block is located in the cutting tool recess. This ensures a reliable connection.

[0011] Preferably, the end face of the cutting section pressing block away from the cutting section bolt has a smooth transition with the reversing guide slope, and the end face of the cutting section pressing block away from the cutting section bolt has a smooth transition with the surface of the cutting blade. This ensures good reliability for moving and reversing the cut portion during practical use.

[0012] Preferably, the reversing guide slope is recessed into the cutter holder. This prevents the cut portion from moving back and forth, thereby improving the reliability of the reversing.

[0013] Preferably, the cable outer sheath fixing mechanism includes a cable outer sheath support base plate and transverse pressing strips that are vertically connected to the cable outer sheath support base plate via a lifting mechanism. The frame is equipped with a transverse slide rail, and the cable outer sheath support base plate is slidably connected to the transverse slide rail. The cutter is aligned with the transverse channel formed between the two pressing strips. A transverse support protrusion is provided within the transverse channel, and the upper surface of the transverse support protrusion is arc-shaped, with its center line extending transversely. In use, the cable outer sheath is unfolded and placed on the cable outer sheath support base plate, and then fixed by pressing it against both sides of the cable outer sheath with the transverse pressing strips. The cable outer sheath is located on the cable outer sheath support base plate, with its length direction being transverse. The outer surface of the sliding sleeve rests downwards on the transverse support protrusions, which better packages and unfolds the cable outer sheath and makes it adhere tightly to the cable outer sheath support base plate, improving the precision of the dumbbell-shaped cable outer sheath produced.

[0014] Preferably, the lower surface of the pressing strip is provided with a plurality of pressing teeth distributed laterally, the pressing teeth extending longitudinally. This improves the reliability of pressing and fixing, and prevents loosening caused by the force when the cable outer sheath is reset.

[0015] Preferably, the device also includes a plurality of pressing rollers arranged laterally and aligned with the channel, connected to the vertical moving mechanism. These pressing rollers extend into the transverse channel to press the cable outer sheath located on the cable outer sheath support base plate when the cable outer sheath support base plate is directly below them. When the cable outer sheath fixing mechanism moves toward the cutter, the pressing rollers press down on the cable outer sheath, thereby enabling more reliable and precise stripping.

[0016] Preferably, the cutting tool includes a cutting tool holder and a cutting tool detachably connected to the cutting tool holder. A working space is provided between the pressing roller closest to the cutting tool and the cutting tool for installing and removing the cutting tool. This facilitates the installation and removal of the cutting tool.

[0017] Preferably, the vertical moving mechanism is connected to a pressure roller located within the working space via a vertically telescopic suspension cylinder. The pressure roller is used to press against the cable outer sheath when the cutting tool is cutting the cable outer sheath located on the cable outer sheath support base plate. This ensures the reliability of the cutting tool during cutting (if it is not pressed down, it is easy to bulge upwards, resulting in poor uniformity and reliability of the rear end of the cut portion).

[0018] Preferably, the distance between the pressing point of the pressure roller on the cable sheath and the cutting edge of the cutting blade is less than 3 mm.

[0019] Preferably, the lifting mechanism includes two transverse drive bars with drive grooves located below the cable outer sheath support base plate, a transverse lead screw rotatably connected to the cable outer sheath support base plate, a threaded sleeve of a fixing mechanism connected to the transverse lead screw, two longitudinally extending drive heads connected to the threaded sleeve of the fixing mechanism and correspondingly inserted into the drive grooves, and a transverse lead screw drive motor for driving the transverse lead screw to rotate. The transverse lead screw drive motor and the threaded sleeve of the fixing mechanism are both fixed to the cable outer sheath support base plate. Each end of the two transverse drive bars is connected to the ends of the two transverse pressing bars via a vertical connecting rod, which passes through the cable outer sheath support base plate. This achieves transverse lifting driven by the rotation of the horizontal lead screw, resulting in a compact structure. The entire lifting mechanism is located below the cable outer sheath support base plate, avoiding interference with the cutting tool.

[0020] Preferably, the cable outer sheath support base plate has two sliding seats at its lateral ends, which are supported on the lateral slide rail. The lateral lead screw passes through the sliding seats, and the two lateral drive bars are located on both sides of the lateral lead screw. This provides good stability.

[0021] Preferably, the pressing strip has a long, elongated through-hole extending vertically through the pressing strip. A vertical connecting rod passes through the long, elongated through-hole and connects a pressing block located at the upper end of the long, elongated through-hole and a lifting block located at the lower end of the long, elongated through-hole. The cable outer sheath support base plate has two supporting inclined surfaces distributed longitudinally on both sides of the transverse channel. The two transverse pressing strips are located directly above the two supporting inclined surfaces. When the cable outer sheath is supported on the cable outer sheath support base plate, the two edges of the cable outer sheath are pressed against the two supporting inclined surfaces by the two pressing strips. When the transverse pressing strips descend to clamp the cable outer sheath, they can drive the cable outer sheath to be longitudinally tensioned, thereby ensuring the reliability of the cable outer sheath when it is tightly attached to the cable outer sheath support base plate.

[0022] Preferably, the transverse pressing strip has a pressing slope that cooperates with the supporting slope. This improves reliability when tensioning the cable outer sheath.

[0023] Preferably, the lateral movement mechanism includes an active synchronous pulley rotatably connected to the frame, a lateral movement motor that drives the active synchronous pulley to rotate, a driven synchronous pulley rotatably connected to the frame, and a synchronous belt with both ends fixed to the cable outer sheath fixing mechanism. The active and driven synchronous pulleys are distributed laterally at both ends of the frame, and the synchronous belt bypasses the active and driven pulleys to drive the driven synchronous pulley to rotate through the rotation of the active pulley.

[0024] Preferably, the vertical moving mechanism includes a connecting frame, a vertical guide rod passing through the connecting frame, a threaded sleeve of the moving mechanism part connected to the connecting frame, a vertical lead screw threadedly connected to the threaded sleeve of the moving mechanism part, and a vertical lead screw drive motor for driving the vertical lead screw to rotate. The vertical guide rod is fixed together with the frame, the vertical lead screw is rotatably connected to the frame, and the cutting tool and dumbbell-shaped forming mold are fixed on the connecting frame.

[0025] Preferably, the frame is equipped with a housing, and the dumbbell-shaped forming mold, cable outer sheath fixing mechanism, lateral movement mechanism, cutting blade, and vertical movement mechanism are all located inside the housing. The front of the housing has loading and unloading ports, and a door panel is connected to the housing to close these ports. This design offers a neat appearance and good safety.

[0026] Preferably, the door panel is connected to the outer casing via a reversing structure that allows it to be moved from a closed position at the loading / unloading port to a position above the top wall of the outer casing for opening. This reduces the planar space required for opening and closing the door. When the door is positioned below a person's height, the person does not need to back away to avoid it during opening and closing, thus improving ease of use.

[0027] Preferably, the reversing structure includes two transmission frames connected to the horizontal ends of the door panel. When the door panel is closed, the transmission frames are located inside the housing. Each transmission frame includes a first swing rod, one end of which is hinged to the frame via a first horizontal pivot pin; a sliding block connected to the other end of the first swing rod; a door panel slide rail slidably connected to the sliding block; and a second swing rod, one end of which is hinged to the inner surface of the door panel via a second horizontal pivot pin. The other end of the second swing rod is hinged to the vertical center of the frame via a third horizontal pivot pin. The door panel slide rail is connected to the inner surface of the door panel. When the door panel is closed, the door panel slide rail extends vertically, and the sliding block can swing about the first horizontal pivot pin to the top of the housing. When the door panel is closed, the sliding block is located at the upper end of the door panel, and the connection point between the second swing rod and the door panel is located at the lower end of the door panel. When the door panel is open, the door panel covers the top of the housing, and the connection points between the sliding block and the second swing rod and the door panel are both located at the front end of the door panel. In use, pulling down the door panel closes the door panel.

[0028] Preferably, the inlet / outlet is provided with a limiting step, and when the door panel is closed, the inner surface of the door panel abuts against the limiting step. This ensures reliability when the door is closed.

[0029] Preferably, the upper end of the limiting step is provided with a rearward-sloping clearance section. This further reduces the horizontal space required when opening and closing the door.

[0030] Preferably, a handle is provided on the outer surface of the door panel. In use, the door is opened and closed manually by pulling the handle.

[0031] Preferably, when the door panel is closed, the handle is located at the bottom of the door panel.

[0032] Preferably, a door-opening cylinder is provided on a transfer frame. One end of the door-opening cylinder is hinged to a second rocker arm via a fourth horizontal pivot pin, and the other end is hinged to the frame via a fifth horizontal pivot pin. This enables automatic door opening and closing via the door-opening cylinder.

[0033] Preferably, the door opening / closing cylinder is in an extended state when the door panel is opened.

[0034] This invention has the following advantages: it can quickly produce dumbbell-shaped cable outer sheaths from removed cable outer sheaths; after flattening the cable outer sheath and taking samples, it can produce dumbbell-shaped cable outer sheaths with a certain width when the diameter of the outer sheath is small; the pressing pressure when fixing the cable outer sheath can generate a force that tensions the cable outer sheath, making the cable outer sheath more reliably maintain a flat state, thereby making the dimensional accuracy of the cut sample high (if the cable outer sheath experiences a rise or fall in the thickness direction during cutting, the dimensional accuracy of the rear end of the removed sample will definitely be poor uniformity). Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a dumbbell-shaped prototype machine for the outer sheath of this cable;

[0036] Figure 2 This is a schematic diagram of the dumbbell-shaped outer sheath of a cable.

[0037] Figure 3 for Figure 1 A magnified view of a portion of point A;

[0038] Figure 4 A schematic diagram of a dumbbell-shaped prototype machine for cable outer sheath after removing the outer casing;

[0039] Figure 5 A frontal view of the dumbbell-shaped cable sheath prototype after the outer casing has been removed;

[0040] Figure 6 A schematic diagram of a cable outer sheath fixing mechanism from one perspective;

[0041] Figure 7 A schematic diagram of another perspective on the cable outer sheath fixing mechanism;

[0042] Figure 8 This is a schematic diagram of a shaving tool;

[0043] Figure 9 This is a schematic diagram of the cutter holder;

[0044] Figure 10 This is a schematic diagram of a cutting blade;

[0045] Figure 11 This is a schematic diagram of the cable outer sheath fixing mechanism in Embodiment 2.

[0046] In the diagram: 1. Frame; 2. Outer casing; 3. Loading / unloading port; 4. Door panel; 5. Limiting step; 6. Clearance section; 7. Handle; 8. Transmission frame; 9. First horizontal shaft pin; 10. First swing arm; 11. Sliding block; 12. Door panel slide rail; 13. Second horizontal shaft pin; 14. Second swing arm; 15. Third horizontal shaft pin; 69. Door opening / closing cylinder; 16. Fourth horizontal shaft pin; 17. Fifth horizontal shaft pin; 18. Cutter; 19. Dumbbell-shaped forming mold; 20. Cable outer sheath fixing mechanism; 21. Lateral movement mechanism; 22. Vertical movement mechanism; 23. Connecting frame; 24. Vertical guide rod; 25. Threaded sleeve of movement mechanism; 26. Vertical lead screw; 27. Vertical lead screw drive motor; 28. Cutter holder; 29. ​​Cutter blade; 66. Changing guide slope; 67. Blade mounting groove; 30. End of blade mounting groove facing the cutting edge of the cutter blade; 31. Cutting edge forming slope; 32. Cutter. Fixed block 33, bolt through hole of the cutting tool 34, threaded hole of the cutting tool 35, recess of the cutting tool 36, cable outer sheath support base plate 37, transverse pressing strip 38, transverse slide rail 39, sliding seat 40, transverse channel 41, transverse support protrusion 42, upper surface of transverse support protrusion 43, pressing tooth 44, pressing roller 45, working space 46, suspension cylinder 47, pressure roller 48, drive inclined groove 49, transverse drive bar 50, transverse lead screw 51, threaded sleeve of fixed connection mechanism 52, drive head 53, transverse lead screw drive motor 54, vertical connecting rod 55, active synchronous pulley 56, transverse moving motor 57, driven synchronous pulley 58, synchronous belt 59, dumbbell shape of cable outer sheath 60, long through hole 61, pressing block 62, lifting block 68, support inclined surface 63, cable outer sheath 64, pressing inclined surface 65. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] See Figures 1 to 10A method for preparing a dumbbell-shaped cable outer sheath sample includes the following steps: First, unfold the stripped cable outer sheath; second, use a cutting tool to remove one side of the surface layer from the unfolded cable outer sheath; third, form a dumbbell-shaped cut on the side of the unfolded cable outer sheath where one side of the surface layer has been removed, the depth of which is greater than the thickness of the dumbbell-shaped cable outer sheath; fourth, use the cutting tool again to remove the middle layer of the sheath from the unfolded cable outer sheath with the dumbbell-shaped cut, and remove the portion of the middle layer of the sheath surrounded by the dumbbell-shaped cut, which is the dumbbell-shaped cable outer sheath sample. Specifically, this is achieved using a cable outer sheath dumbbell-shaped sample preparation machine, which includes a frame 1. The frame has a housing 2. The front of the housing has inlet and outlet ports 3, and a door panel 4 is connected to the housing to close the inlet and outlet ports. The inlet and outlet are equipped with a limiting step 5. When the door panel is closed, the inner surface of the door panel abuts against the limiting step. The upper end of the limiting step is equipped with a rearward-sloping clearance section 6. The door panel is connected to the outer shell through a reversing structure that allows the door panel to be moved from a closed state at the inlet and outlet to a position above the top wall of the outer shell for opening. A handle 7 is provided on the outer surface of the door panel. When the door panel is closed, the handle is located at the lower end of the door panel. The reversing structure includes two transmission frames 8 connected to the horizontal ends of the door panel. When the door panel is closed, the transmission frames are located inside the housing. The transmission frames include a first swing rod 10, one end of which is hinged to the frame via a first horizontal pivot pin 9; a sliding block 11 connected to the other end of the first swing rod; a door panel slide rail 12 slidably connected to the sliding block; and a second swing rod 14, one end of which is hinged to the inner surface of the door panel via a second horizontal pivot pin 13. The other end of the second swing rod is hinged to the vertical middle of the frame via a third horizontal pivot pin 15. The door panel slide rail is connected to the inner surface of the door panel. When the door panel is closed, the door panel slide rail extends in the vertical direction, and the sliding block can swing about the first horizontal pivot pin to the top of the housing. When the door panel is closed, the sliding block is located at the upper end of the door panel, and the connection point between the second swing rod and the door panel is located at the lower end of the door panel. When the door panel is open, the door panel covers the top of the housing, and the connection points between the sliding block and the second swing rod and the door panel are both located at the front end of the door panel. The door panel slide rail can only slide on the sliding block and cannot detach (i.e., the door panel slide rail remains connected to the sliding block during sliding). A door opening / closing cylinder 69 is installed on the transfer frame at the left end. One end of the cylinder is hinged to the second swing arm via the fourth horizontal pivot pin 16, and the other end is hinged to the frame via the fifth horizontal pivot pin 17. When the door panel is opened, the cylinder is in its extended state.

[0050] The outer casing has a horizontally arranged loading position, a cutting blade mounting position, and a die-cutting position. A cutting blade 18 is mounted on the cutting blade mounting position, and a dumbbell-shaped forming mold 19 is mounted on the die-cutting position. The frame also includes a cable outer sheath fixing mechanism 20, a horizontal moving mechanism 21, and a vertical moving mechanism 22. The dumbbell-shaped forming mold, cable outer sheath fixing mechanism, horizontal moving mechanism, cutting blade, and vertical moving mechanism are all located within the outer casing. The lateral movement mechanism is used to drive the cable outer sheath fixing mechanism to reciprocate between the loading position and the die-cutting position. When the cable outer sheath fixing mechanism passes the cutter mounting position, the cutter can remove the surface of the cable outer sheath fixed on the cable outer sheath fixing mechanism. The vertical movement mechanism is used to drive the cutter and the dumbbell-shaped forming mold to move up and down. When the cable outer sheath fixing mechanism is in the die-cutting position, the dumbbell-shaped forming mold is driven by the vertical movement mechanism to close towards the dumbbell-shaped forming mold and die-cut out the dumbbell shape of the cable outer sheath that is still connected to the cable outer sheath on the cable sheath fixed on the cable outer sheath fixing mechanism (that is, to cut out the dumbbell-shaped cut that forms the outline of the dumbbell shape of the cable outer sheath).

[0051] The vertical moving mechanism includes a connecting frame 23, four vertical guide rods 24 passing through the connecting frame, a threaded sleeve 25 for the moving mechanism section connected to the connecting frame, a vertical lead screw 26 threadedly connected to the threaded sleeve for the moving mechanism section, and a vertical lead screw drive motor 27 for driving the vertical lead screw to rotate. The vertical lead screw drive motor drives the vertical lead screw to rotate via a pulley and belt. The upper and lower ends of the vertical guide rods are fixed to the frame, and the vertical lead screw is rotatably connected to the frame. There are two dumbbell-shaped forming molds, which are distributed laterally and fixed to the connecting frame.

[0052] The cutting tool includes a cutting tool holder 28 and a cutting tool 29 detachably connected to the cutting tool holder. The cutting tool holder is connected to a connecting frame. The direction lines of all parts of the cutting edge of the cutting tool are located on a horizontal plane, and the cutting edge of the cutting tool is a straight structure. The cutting edge of the cutting tool faces to the right. A reversing guide slope 66 is provided between the upper end of the cutting tool holder and the cutting tool. The reversing guide slope is used to guide the shavings cut from the cable outer sheath to move in the direction of the cutting tool cutting the cable outer sheath (that is, the reversing direction is consistent with the direction of the cutting edge). The cutting tool holder is provided with a cutting tool mounting groove 67. The end 30 of the cutting tool mounting groove facing the cutting edge of the cutting tool is lower and the other end is higher. The width of the cutting tool mounting groove is equal at all points. The cutting tool passes through the cutting tool mounting groove. The surfaces at both ends of the cutting tool in the thickness direction (i.e., the upper and lower side surfaces) are flat. The part of the cutting tool that extends beyond the cutting tool mounting groove and is away from the reversing guide slope is provided with a cutting edge forming slope 31. The cutting edge 32 of the cutting tool is formed between the cutting edge forming slope and the surface of the cutting tool facing the reversing guide slope. A cutting tool retaining block 33 is detachably connected to the cutting tool holder, its upper surface in the same direction as the cutting tool's thickness contacting and pressing against the cutting tool. The cutting tool holder has a cutting tool bolt through hole 34 extending along the cutting direction of the cutting tool. The cutting tool retaining block has a cutting tool threaded hole 35. After the cutting tool bolt passes through the cutting tool bolt through hole, it is threaded into the cutting tool threaded hole, driving the cutting tool retaining block to move away from the cutting edge of the cutting tool, thus pressing the cutting tool retaining block firmly against the cutting tool. A cutting tool recess 36 is provided on the reversing guide slope, and the cutting tool retaining block is located within the cutting tool recess. The end face of the cutting tool pressing block away from the cutting tool bolt has a smooth transition with the reversing guide slope, and the end face of the cutting tool pressing block away from the cutting tool bolt has a smooth transition with the surface of the cutting tool. The reversing guide slope is recessed into the cutting tool holder.

[0053] The cable outer sheath fixing mechanism includes a cable outer sheath support base plate 37 and two transverse pressing strips 38 that are vertically connected to the cable outer sheath support base plate via a lifting mechanism. A transverse slide rail 39 is provided on the frame. A sliding seat 40 is provided at each of the transverse (i.e. left and right) ends of the cable outer sheath support base plate. The sliding seats are slidably connected to the transverse slide rail.

[0054] The cutter is aligned with the transverse channel 41 formed between the two pressing strips. A transverse support ridge 42 is provided within the transverse channel, the upper surface 43 of which is arc-shaped, with its center line extending transversely. Several pressing teeth 44 are distributed transversely on the lower surface of the pressing strips, extending longitudinally. A plurality of pressing rollers 45, aligned with the transverse channel and connected to the connecting frame, are also included. These pressing rollers extend into the transverse channel to press the cable outer sheath on the cable outer sheath support base plate when the cable outer sheath support base plate is directly below them. A working space 46 is provided between the pressing roller closest to the cutter and the cutter for installing and removing the cutter blade. A pressure roller 48 located within the working space is connected to the vertically extending suspension cylinder 47 via a vertically telescopic suspension cylinder. This pressure roller presses against the cable outer sheath when the cutter cuts the cable outer sheath on the cable outer sheath support base plate. The distance between the pressing point of the pressure roller on the cable sheath and the cutting edge of the cutting blade is less than 3 mm. The lifting mechanism includes two transverse drive bars 50 with drive grooves 49 located below the cable outer sheath support base plate, a transverse lead screw 51 rotatably connected to the cable outer sheath support base plate, a threaded sleeve 52 of the fixing mechanism part threadedly connected to the transverse lead screw, two longitudinally extending drive heads 53 connected to the threaded sleeve of the fixing mechanism part and correspondingly passing through the drive grooves on the two transverse drive bars, and a transverse lead screw drive motor 54 that drives the transverse lead screw to rotate. The transverse lead screw drive motor drives the transverse lead screw through a belt and pulley. The transverse lead screw drive motor and the threaded sleeve of the fixing mechanism part are both fixed to the cable outer sheath support base plate. Each end of the two transverse drive bars is connected to the ends of the two transverse pressing bars correspondingly through a vertical connecting rod 55, which passes through the cable outer sheath support base plate. The transverse lead screw passes through the sliding seat, and two transverse drive bars are located on both sides of the longitudinal direction of the transverse lead screw.

[0055] The lateral movement mechanism includes an active synchronous pulley 56 rotatably connected to the frame, a lateral movement motor 57 that drives the active synchronous pulley to rotate, a driven synchronous pulley 58 rotatably connected to the frame, and a synchronous belt 59 fixed at both ends to the cable outer sheath fixing mechanism. The active and driven synchronous pulleys are distributed laterally at both ends of the frame. The synchronous belt passes around the active and driven pulleys to drive the driven synchronous pulley to rotate through the rotation of the active pulley.

[0056] The process of creating a dumbbell-shaped cable outer sheath using this invention is as follows: The stripped cable outer sheath is unfolded and fixed onto the cable outer sheath fixing mechanism. A vertical moving mechanism drives a cutting blade to descend to the required height, while a horizontal moving mechanism drives the cable outer sheath fixing mechanism to move toward the die-cutting position. During this movement, the cable outer sheath passes by the cutting blade, and one side of the surface layer is removed. After the cable outer sheath fixing mechanism reaches the die-cutting position, the vertical moving mechanism drives the dumbbell-shaped forming mold to descend, cutting a dumbbell-shaped notch on the cable outer sheath. The depth of the dumbbell-shaped notch is greater than or equal to the thickness of the middle layer of the outer sheath. The vertical mechanism drives the dumbbell-shaped forming mold and the cutting blade to rise to avoid obstacles. The horizontal movement mechanism drives the cable outer sheath fixing mechanism to reach the loading position. The vertical movement mechanism drives the cutting blade to descend, so that the distance between the cutting blade edge and the upper surface of the cable outer sheath fixed on the cable outer sheath fixing mechanism is the thickness of the outer sheath middle layer. The horizontal movement mechanism drives the cable outer sheath fixing mechanism to move towards the die-cutting position again. During the movement, the cable outer sheath passes through the cutting blade and the outer sheath middle layer is cut off by the cutting blade. The two cable outer sheath dumbbell shapes 60 on the outer sheath middle layer are removed.

[0057] The process of fixing the cable outer sheath to the cable outer sheath fixing mechanism is as follows: After the cable outer sheath is unfolded, it rests on the cable outer sheath support base plate and tightly covers the support protrusions. The length of the cable outer sheath extends laterally, and the inner surface of the cable outer sheath faces (i.e., towards the support protrusions). Then, it is pressed against both sides of the cable outer sheath by a transverse pressing bar. The transverse pressing bar is fixed by being driven to move down by a lifting mechanism. The lifting process of the lifting mechanism is as follows: the transverse screw drive motor drives the transverse screw to rotate, the transverse screw drives the transverse threaded sleeve to move laterally, and the transverse threaded sleeve drives the drive head to move laterally synchronously when it moves laterally. When the drive head moves laterally, it cooperates with the drive slant to drive the transverse drive bar to rise and fall. When the transverse drive bar rises and falls, the transverse pressing bar is driven to rise and fall through the vertical connecting rod.

[0058] Example 2 differs from Example 1 in that:

[0059] See Figure 11 The pressing strip has a long, vertically extending through-hole 61. The upper end of a vertical connecting rod passes through the long, vertical through-hole. The vertical connecting rod is connected to a pressing block 62 located at the upper end of the long, vertical through-hole and a lifting block 68 located at the lower end of the long, vertical through-hole (the lifting block lifts the transverse pressing strip when it rises, and the pressing block presses down the transverse pressing strip when it falls). The cable outer sheath support base plate has two supporting inclined surfaces 63 distributed longitudinally on both sides of the transverse channel. The two transverse pressing strips are located directly above the two supporting inclined surfaces. When the cable outer sheath 64 is supported on the cable outer sheath support base plate, the two sides of the cable outer sheath are pressed against the two supporting inclined surfaces by the two pressing strips. The transverse pressing strip has a pressing inclined surface 65 that cooperates with the supporting inclined surfaces.

[0060] When the horizontal pressing strip of this technical solution presses against the outer sheath, it generates a longitudinal pulling force on the outer sheath, making the cable outer sheath more reliably and fully tensioned, thereby achieving the dumbbell-shaped precision of the cable outer sheath.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element; directional orientation is merely a relative relation.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method of cable outer jacket dumbbell sampling, characterized by, The first step is to spread the stripped cable outer sheath; the second step is to make the cable outer sheath in the spread state pass through the cutter to shave off a side surface layer; The third step is to form a dumbbell-shaped cutout matching the dumbbell-shaped cable outer sheath on the surface layer of the cable outer sheath in the spread state after shaving off a side surface layer, and the depth of the dumbbell-shaped cutout is above the thickness of the cable outer sheath dumbbell; the fourth step is to make the cable outer sheath with a dumbbell-shaped cutout in the spread state pass through the cutter to shave off the sheath intermediate layer, and take off the part of the sheath intermediate layer located in the dumbbell-shaped cutout, which is the cable outer sheath dumbbell; specifically, it is realized by a cable outer sheath dumbbell sample making machine, which comprises a rack, a loading position, a cutter installation position and a die cutting position are arranged on the rack in sequence, a cutter is installed on the cutter installation position, a dumbbell sample forming die is installed on the die cutting position, a cable outer sheath fixing mechanism, a horizontal moving mechanism and a vertical moving mechanism are further arranged on the rack; the specific process of making the cable outer sheath dumbbell is as follows: the stripped cable outer sheath is spread and fixed on the cable outer sheath fixing mechanism, the length direction of the cable outer sheath is horizontally extended, the cutter is driven to descend to the required height by the vertical moving mechanism, the cable outer sheath fixing mechanism is driven to move towards the die cutting position by the horizontal moving mechanism, the cable outer sheath is shaved off a side surface layer by the cutter during the moving process, the cable outer sheath fixing mechanism reaches the die cutting position, the dumbbell sample forming die is driven to descend by the vertical moving mechanism to cut a dumbbell-shaped cutout on the cable outer sheath, the depth of the dumbbell-shaped cutout is above the thickness of the outer sheath intermediate layer, the dumbbell sample forming die and the cutter are driven to rise by the vertical mechanism to avoid, the cable outer sheath fixing mechanism is driven to return to the loading position by the horizontal moving mechanism, the cutter is driven to descend by the vertical moving mechanism so that the distance between the cutter blade and the upper surface of the cable outer sheath fixed on the cable outer sheath fixing mechanism is the thickness of the outer sheath intermediate layer, the cable outer sheath fixing mechanism is driven again towards the die cutting position by the horizontal moving mechanism, the outer sheath intermediate layer is shaved off by the cutter during the moving process, and the part of the outer sheath intermediate layer located in the dumbbell-shaped cutout is taken off, which is the cable outer sheath dumbbell; the cable outer sheath fixing mechanism comprises a cable outer sheath support bottom plate and two horizontal pressing strips which are connected to the cable outer sheath support bottom plate by a lifting mechanism, a horizontal sliding rail is arranged on the rack, the cable outer sheath support bottom plate is slidingly connected to the horizontal sliding rail, a horizontal channel is formed between the cutter and the two pressing strips, a horizontal support convex strip is arranged in the horizontal channel, the upper surface of the horizontal support convex strip is an arc surface, and the center line of the arc surface extends horizontally.

2. A method of preparing a cable jacket dumbbell according to claim 1, wherein, The shaving cutter comprises a shaving cutter seat and a shaving cutter blade detachably connected to the shaving cutter seat, the shaving cutter seat is connected to the vertical moving mechanism, the direction lines of each part of the cutting edge of the shaving cutter blade are located on a horizontal plane, a reversing guide slope is arranged between the upper end of the shaving cutter seat and the shaving cutter blade, and the reversing guide slope is used for guiding the reversed direction of the shaved layer from the outer sheath of the cable to the direction of moving along the shaving cutter to shave the outer sheath of the cable.

3. A method of preparing a cable jacket dumbbell according to claim 1, wherein, The lower surface of the pressing strip is provided with a plurality of pressing teeth distributed in the transverse direction.

4. A method of preparing a cable jacket dumbbell according to claim 1, wherein, The vertical moving mechanism is further connected to a plurality of pressing rollers distributed in the transverse direction and aligned with the transverse channels, the pressing rollers are used for pressing the outer sheath of the cable in the transverse channels when the cable outer sheath supporting bottom plate is located directly below the pressing rollers.

5. A method of preparing a cable jacket dumbbell according to claim 4, wherein, The shaving cutter comprises a shaving cutter seat and a shaving cutter blade detachably connected to the shaving cutter seat, the shaving cutter seat is connected to the vertical moving mechanism, the direction lines of each part of the cutting edge of the shaving cutter blade are located on a horizontal plane, a reversing guide slope is arranged between the upper end of the shaving cutter seat and the shaving cutter blade, and the reversing guide slope is used for guiding the reversed direction of the shaved layer from the outer sheath of the cable to the direction of moving along the shaving cutter to shave the outer sheath of the cable.

6. A method of preparing a cable jacket dumbbell according to claim 1, wherein, The lifting mechanism comprises two transverse driving strips provided with driving inclined grooves and located below the cable outer sheath supporting bottom plate, a transverse screw rod rotatably connected to the cable outer sheath supporting bottom plate, a fixed mechanism part threaded sleeve screw-connected to the transverse screw rod, two longitudinally extending driving heads corresponding to the driving inclined grooves and driving the transverse screw rod to rotate, and a transverse screw rod driving motor, the transverse screw rod driving motor and the fixed mechanism part threaded sleeve are fixed to the cable outer sheath supporting bottom plate, and the two ends of the two transverse driving strips are respectively connected to the two ends of the two transverse pressing strips through a vertical connecting rod.

7. A method of preparing a cable jacket dumbbell according to claim 6, wherein, The pressing strip is provided with a longitudinally extending long hole penetrating the pressing strip in the vertical direction, the vertical connecting rod is arranged in the long hole, the vertical connecting rod is connected to a pressing block located at the upper end of the longitudinal long hole and a jacking block located at the lower end of the longitudinal long hole, the cable outer sheath supporting bottom plate is provided with two supporting inclined surfaces distributed in the longitudinal direction and located on the two sides of the transverse channels, the two transverse pressing strips are respectively located directly above the two supporting inclined surfaces, and when the cable outer sheath is supported on the cable outer sheath supporting bottom plate, the two side edges of the cable outer sheath are pressed on the two supporting inclined surfaces by the two pressing strips.

8. A method of preparing a cable jacket dumbbell according to claim 1, wherein, The frame is provided with a shell, the dumbbell-shaped forming die, cable outer sheath fixing mechanism, transverse moving mechanism, cutter and vertical moving mechanism are located in the shell, the front side of the shell is provided with an upper and lower material feeding port, the shell is connected with a door plate which closes the upper and lower material feeding port, the door plate is connected with the shell through a reversing structure which can make the door plate transfer from the state of closing the upper and lower material feeding port to opening the door which is located above the top wall of the shell, the reversing structure comprises two transmission frames which are connected with the lateral two ends of the door plate, the transmission frame is located in the interior of the shell when the door plate is closed, the transmission frame comprises a first swing lever which is hinged with the frame through a first horizontal shaft pin, a sliding block which is connected with the other end of the first swing lever, a door plate part slide rail which is slidably connected with the sliding block and a second swing lever which is hinged with the inner surface of the door plate through a second horizontal shaft pin, the other end of the second swing lever is hinged with the vertical middle part of the frame through a third horizontal shaft pin, the door plate part slide rail is connected with the inner surface of the door plate, the door plate part slide rail extends in the up and down direction when the door plate is closed, the sliding block can swing around the first horizontal shaft pin to be located above the shell; when the door plate is closed, the sliding block is located at the upper end of the door plate, the connecting point of the second swing lever and the door plate is located at the lower end of the door plate; when the door plate is opened, the door plate is shielded above the shell, the sliding block and the connecting point of the second swing lever and the door plate are all located at the front end of the door plate.

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